POST parameters: Array
(
    [product_id] => "15"
    [product_name] => demo 10
    [description] => demo 10
    [price] => 100
    [category_id] => 
)
POST parameters: Array
(
    [product_id] => "15"
    [product_name] => demo 10
    [description] => demo 10
    [price] => 100
)